On Thu, Nov 21, 2019 at 2:01 AM Bill Beam <wb...@gci.net> wrote: > Most people interested in this problem have been dead for about 200 years. > > I knew there was a reason why I didn't feel so well lately ..
I have an electric pendulum clock by Bulle. A coil swings in a short arc, following a curved magnetic polepiece. At some point, contacts close and provide a timed sustaining impulse to the coil. Out of sheer pigheadedness, I am attempting to monitor the movement with antique (perhaps not quite so antique) timing equipment. I have an HP456A current probe to capture the impulse instance, an HP 5275A counter to measure the period and an HP101A oscillator to provide a reference. ADEV calculations might be done by an HP9815 calculator or perhaps an HP41 if I can't find the 9815's parallel interface. Non-HP equipment is permitted but nothing suitable has come up so far. A difficulty at the moment is that the contacts bounce somewhat, making the impulse timing poorly defined. I haven't yet got as far as seeing any mechanically caused pattern to the errors. Thanks to Tom for giving me more distractions to read :) _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.